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AR15 Bolt Carrier Group - C158
AR15 Bolt Carrier Group - C158

Our Price: $84.95

Product Code: PMABCG158NITRIDE


The PMA Bolt Carrier Group - Auto Version - for your M4 or AR15.  Machined to USGI specifications. This M16/M4 Carrier includes the proper Mil-Spec Gas Key. The Gas Key Heat Treated per USGI specifications. The Gas Key is properly staked per Military-Specifications. These properly hardened parts insure a strong staking and proper Gas System functioning. The Bolt Assembly is machined from Mil-Spec Carpenter 158 Steel, Shot Peened for increased strength and includes Tool Steel machined Extractor and Ejector, XD Extractor & Ejector Springs and is High Pressure Tested and Magnetic Particle Inspected. Nitrided by H&M Blacknitride


  • M16 8620 Tool Steel Carrier
  • Carpenter 158 Steel Bolt
  • Shot Peened
  • HPT Bolt - High Pressure Tested
  • MPI Bolt - Magnetic Particle Inspected
  • S7 Tool Steel Extractor
  • 5 Coil XD Extractor Spring
  • Ejector Spring
  • 8620 Gas Key Hardened to USGI Specifications
  • Fasteners
  • Key Staked Per Mil-Spec using 620 Loctite
  • 17-4 Stainless Firing Pin
  • 8620 Cam Pin
  • Machined to USGI Specifications
  • Fully Demagnetized
  • Nitride by H&M Black Nitride
  • MILSPEC Charging handle

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